Started off Bullseye target shooting with 38 wadcutter & 45acp where group size ( particularly @ 50 yds. ) was king . Pressure was of no concern due to the mild loads . Now I'm trying to work up loads for 357 & 41 mags . I want reasonable accuracy & in the neighborhood of 1150 - 1200fps to start with . Bullets I'm using are the 358429 & 410459 sized to fit my guns . Assuming that a load is accurate enough & has the velocity I want , what is reasonable in terms of spread & standard deviation ? Case in point a 357 load of 8.5grs SR-4756 & 358429 has a mean vel of 1,253 fps , spread of 31 fps & SD was 8 . 25 shot string & was able to keep all within the 9 ring on a B-8 target @ 25 yds . I suspect that this kind of uniformity is the exception rather than the rule . When working up from a starting load how much of a bump in charge weight to the next load ? For instance if say starting load is 8grs & max is 10grs , would you load 8.0 , then 8.5 next , then 9.0 & so on ? Later down the road loads that show promise I can try different crimp amount & maybe different primers to boot to see if they can be improved ? BTW I'm using WSPM in 357 & plan on using WLP in the 41 .